Wow, just got reading first to last. Got the 436, had Sentinel for a couple weeks, made some FL's, then made them again, again, again. OK the new Sentinel format is a different breed to me. My last digital scanner was the Pro-96, I worked with Win-96 and Pro-96-Com software's, got good with them. (Hey I'm smart) YA-Right? I opened a note pad and started cutting and pasting as I went threw the forum, lot of chaff, not even close to helping me. As I found things I could use, I saved them. Having owned the Pro-96 and now this radio (first impression) Great! Audio, Great!, Range of reception, Great! Haven't found a negative so far. Put in the zip and great results. My learning curve with new terms of programming functions (Sentinal) has me ready to take a break and come back again for another look, see. Some of the posts have been helpful, videos, helpful, Still like pulling teeth, Hope that light bulb in my head soon comes on. Thanks